Duplicator



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DUPLICATOR 3 Sheets-Sheet 1 Filed Dec. 26, 1924 E is TORS

TTTTTT EY April 6 1926.

E. M. DAUS ET AL DUPLICATOR Filed Dec.

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L A s u A D M E 6 2 9 1 6 u r P A DUPLICATOR Filed Dec. 26, 1924 3Sheets-Sheet 5 v arr INVENTORS ATTOR N EY S M 6. m S m E Leonard HD4165%TNESS: a

Patented Apr. 6, 1926.

UNITED STATES PATENT OFFICE.

nxmnsr u. Imus up LEONARD w. DAUS, or NEW "1031:, N. Y.

DUPLICATOR.

Application filed December as, 1924. SeriaI 1%. 758,244.

To all whom it may concern:

Be it known that we, ERNEST M. DAUS and LEONARD W. DAUS, citizens of theUnited States of America, residing at New York city, in the county ofNew York and State of New York, have invented new and usefulImprovements in Duplicators, of which the following is a specification.

This invention relates to improvements in duplicators and has for itsprimary object the provision of a machine wherein use is made of agelatine strip upon which is contained the matter to be duplicated, suchas letters or the like, such strips having been used for this purposebefore, but necessitated the sheet being placed flat over the strip andpressure applied to the sheet by passing the hand back and forth overthe same until sufiicient pressure had been aplied, after which thesheet was separate rom the strip. This process is both slow and tiresomeand it is our invention to overcome these objections by providing a'machine wherein the sheets to be rinted upon -are inserted and pressureapplied evenly to the sheet against the strip automatically upon theoperation of the machine.

Another object of the invention, resides in a duplicating machine whichincludes a rotatable drum upon which the gelatine strip is supported andupon which strip a plurality of different sets of indicia may beinscribed for reproduction, and means for selectively bringing any ofthe indicia into position for duplication upon inserted in the machine.

A further object of the invention is to pro vide a duplicator having aremovable drum for expediting the changing of the gelatine strip when itis desired to insert a. new be duplicated.

strip having other indicia to With these and other objects in view,invention resides in certain novel construction and combination andarrangement 0 parts, the essential features of which are hereinafterfully described, are particularly ointed out in the appended claims, andare illustrated in the accompanying drawings, in which Figure 1 is aside elevation of our invention. r

Figure 2 is a front elevation of the same.

Figure 3 is a top plan view.

. Figure 4 is a vertical longitudinal seca sheet to be the t'ional viewon the line 4-4 of Figure 3.

Figure 5'is a transverse sectional view on the line 55 of Figure 1.

Fi ure 6 is an enlarged horizontal sectiona view on the line 66 ofFigure 1.

7 Referring more particularly to the drawings, the reference numeral 10designates a base and from which ri s s apair of spaced aligned brackets11 whic serve as a support for a rotatable drum 12. The tops of thebrackets are formed with removable bearings 13 for the reception of thestub shafts 14 whereby the drum may be quickly removed for a purpose tobe presently described.

The outer periphery of the drum 12 is not continuous but is cut-away toprovide a pair of spaced ends, which leaves an interval in the rotationof the drum when the (1 same is-out of engagement with the pressuremeans 16 which will be fully described hereinafter. Spaced spiders 17are arranged within the drum, and the opposed portions of which arenotched as at 18 and 1.9 for respectively receiving the spindles of aspool 20 containing a gelatine str p 21 and a winding spool 22 uponwhich the strip is wound after passing about the outer periphery of thedrum. For the sake of clearness, it is here stated that the strip 21 isformed of a gelatine substance upon which the matter to be duplicated isap lied. This matter is placed upon the strip by first preparing theoriginal sheet, such as by typewriting and using a special ink, thenplacing the sheet with the'printed slde in contact with the outersurface of the gelatine strip and applying pressure thereto, after whichthe orlginal sheet is removed leaving an imprint upon the gelatinestrip. This machine is primarily intended for duplicating typewrittenletters or other documents and any number of different letters ordocuments f may be consecutiyely inscribed upona single strip dependingupon the length of the strip and an. length of the letter to beduplicated. The use of a gelatine strip in this manner is broadly old inthe art and a further explanation of the same is not deemed necessary.To prevent the gelatine strip from adhering to the drum, We provide alayer of waterproof material 23 between the drum and the strip in orderto facilitate the easy movement of the strip when unwinding same fromone spool to the other. Ratchet wheels 24 and 25 are mounted upon thespindles of the respective spools 20 and 22, and pawls 26 and 27respectively co-act with the ratchet wheels to prevent retrogrademovement of the spools when winding the strip about the winding spool22. The tension of the strip about the drum serves to hold the spindlesof the spools seated in their respec tive notches and when it is desiredto remove the spools or rolls, the tension is relieved by paying out thestrip from the spool 20. A winding or manipulating knob 28 is providedat one side of the drum for rotating the winding spool 22, and a similarknob 29 is carried by the spool 20' for use in lifting the spool fromthe drum when replacing the gelatine strip.

The pressure means '16 above mentioned comprises a platform 30 which ispivotally mounted upon the base at 31, one end of which serves as abearing for a removable pressure roller 32 which co-acts with the drumwhen the same is rotated- Pressure is applied to the gelatine strip byreason of the springs 33 which tend to pull downward upon the front endof the platform, thereby swinging the rear end upward. A metallic plate34 is mounted on the top face of the platform and a portion of the sameextends slightly about the roller 32 for guiding the sheets over theroller upon their insertion. A guide rail 35 is mounted upon theplatform and when inserting the sheets, the sides of the same are movedagainst the roller so that the sheets enter the machine in perfectrelation with respect to the drum. The guide rail is mounted for lateraladjustment upon the platform as at 36, and a slide 37 is adjustablymounted upon the guide rail for holding the sheets to be printed upon instack formation.

In operation, a sheet is inserted by sliding the same over the platformtoward the roller 32, and the drum is rotated whereupon the sheet ispicked up by the drum, it being understood that the pressure roller 32is disposed in the path of movement of the drum, and as the gelatinestrip engages the roller 32, the same is forced downward against thetension'of the springs 33 thereby applying added pressure between thesheet and the gelatine strip. When the drum has been given a completerevolution by means of the handle 38, the sheet is ready to be removedfrom the gelatine strip with the matter on the strip duplicated upon thesheet, it being understood that the sheet adheres to the strip as thedrum is rotated.

To prevent retrograde movement of the drum, we provide the same with aratchet 39 for co-actiou with a dog 40 mounted on the inside of one ofthe brackets 11. A counting machine 41 is mounted on the other bracket11 and is operable by a trip 42 carneath said ried by the drum, uponeach revolution of the same whereby the number of sheets passing throughthe machine may be recorded.

In the several figures of the drawing, the roller 32 is held out of thepath of movement of the drum by a pivoted member 43 having an outwardlyextending manipulating arm 44, the said member co-acting with a wearplate 45 carried by the underside of the plate 34. When the member is inengagement with the wear plate, the platform is held against the tensionof the springs at which time the device is inoperative due to the roller32 being out of the path of movement of the drum. When the member islowered the springs 33 automatically move the roller 32 into co-actingposition withthe drum. By this arrangement the roller is held fromcontact with the gelatine strip when the device is not in use.

While we have described what we deem to be the most desirable embodimentof our invention, it is obvious that many of the details may be variedwithout in anyway departing from the spirit of our invention, and wetherefore do not limit ourselves to the exact details of constructionherein set forth nor to anything less than the whole of our inventionlimited only by the appended claims.

What is claimed as new is 1. A machine of the class described includinga rotatable drum having indicia to be duplicated thereon, and pressuremeans for co-action with said drum at an interval during each revolutionof the same, said means comprising a pivoted platform constituting thesheet feeding table, a roller supported at one end thereof, and springsat the other end for normally holding said roller in the path ofmovement of said drum.

2. A machine of the class described including a split drum, a strip ofmaterial adapted to have indicia to be duplicated thereon, means foradjustably securing said strip about the periphery of said drum, aplatform constituting the sheet feeding table over which a sheet to beprinted upon is passed, a pressure roller supported by said platform inthe path of movement of said drum, and means for holding said roller outof the path of movement of said drum.

3. A machine of the class described comprising a base, a rotatable drumremovably mounted above said base, a strip adapted to have indiciathereon to be duplicated, means for adjusting said strip about theperiphery of said drum, a platform constituting the sheet feedin tablepivotally mounted berum, a roller carried by said platform in the pathof movement of said drum, and means for exerting pressure between saidroller and said drum upon each revolution of the same.

4. A machine of the class described com- F prising a base, a rotatabledrum removably mounted above said base, a strip having indicia thereonto be duplicated, means. for adjusting said strip about the periphery ofsaid drum, a platform pivotally mounted beneath said drum andconstituting the sheet feeding table, a roller carried by said platformin the path of movement of said drum, and means for exerting pressurebetween said roller and said drum upon each revolu tion of the same,said last means comprising contractile springs between the forward endof said platform and said base.

5; A machine of the class described comprising a base, a rotatable drumremovably mounted above said base, a strip having indicia thereon to beduplicated, means for adjusting said strip about the periphery of saiddrum, a platform pivotally mounted beneath said drum and constitutingthe sheet feeding table, a roller carried by said platform in the pathof movement of said drum, and means for exerting pressure between saidroller and said drum upon each revolution of the same, said last meanscomprising contractile springs between the forward end of said platformand said base, and coacting means between said platform and said basefor holding said roller out of the path of movement of said drum.

In testimony whereof We signatures.

ERNEST M. DAUS. LEONARD W. DAUS.

have affixed our

